Registration Dossier
Registration Dossier
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EC number: 233-658-4 | CAS number: 10294-34-5
Biodegradation in water and sediment: simulation tests
Administrative data
Link to relevant study record(s)
Description of key information
According to column 2 of Annex IX of REACH "Further biotic degradation testing shall be proposed by the registrant if the chemical safety assessment according to Annex I indicates the need to investigate further the degradation of the substance and its degradation products. The choice of the appropriate test(s) depends on the results of the chemical safety assessment and may include simulation testing in appropriate media (e.g. water, sediment or soil)."
The degradation of the inorganic compound boron trichloride is well understood. It degrades rapidly within 1 minute in water to hydrogen chloride and boric acid. Both inorganic degradation products can dissociate but are not further degradable. Biodegradation is not a relevant concept for inorganic substances.
Therefore there is no "need to investigate further the degradation of the substance and its degradation products".
Key value for chemical safety assessment
- Half-life in freshwater:
- 1 min
- at the temperature of:
- 25 °C
- Half-life in freshwater sediment:
- 1 min
- at the temperature of:
- 25 °C
Additional information
The half-life of boron trichloride in water is <1 min, see under Section 5.1.2 Hydrolysis. Boron trichloride can not reach the sediment, without passing first water, where it is hydrolysed.
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